Rotary impact-pulverizer.



c. s. LINCOLN. ROTARYYIMPACT PULVERIZER.

1 APPLICATION FILED SEPT. 15, 1913- 1,166,698

Patented Jan. 4, 1916.

bail and the suspending arms part of this specification,

CHARLES s. Lineman, or WAUWATOS A, -WISCO1\T SIN, ASSIG'NOR TOALLIS-CHALMERS DELAWARE.

ROTARY IMPAGT-PULVERIZER.

Specification of Letters Patent.

Patented J an. 4, 1916.

Application filed September 15, 1913. Serial No. 790,366.

To all whom it may concern:

Be it known that I, CHARLES S. LINCOLN, a citizen of the United States,residing at \Vauwatosa, (Milwaukee,) in the county of Milwaukee andState of Wisconsin, have invented a certain new and useful Improvementin Rotary Impact-Pulverizers, of which the following is a specification.

This invention relates to improvements in the construction of rotaryimpact pulverizers, and more specifically to improvements in theconstruction of hammers or. bails for such pulverizers. v

An object of the invention is to provide a pulverizer hammer or bailwhich is simple in construction, efficient in operation, and readilyrenewable at a minimum cost, when worn.

It has been found with the prior constructions of pulverize'r hammers orbails, that unless very sensitive and complicated devices for permittingoutward adjustment of the gradually wearing bail ends were provided,thepercentage of the metal originally in the bail and necessarilydiscarded when the bail had become worn so as to make it unfit forfurther service, was very high. With the present invention thispercentage of waste material is reduced toa minimum while theeffectiveness of the bail during normal operation is not affected. Theuse of bails constructed in accordance with the present inventionfurthermore permits ready renewal of the wearing portion of the bail,thereby minimizing the time lost in making repairs. In the bails ofthepresent invention, the construction is such that the connection betweenthe beater portion of the thereof. is effectively protected againstinjury during normal operation of the machine.

A clear conception of several embodiments of the invention may be had byreferring to the drawing accompanying and forming a in which likereference characters designate the same or similar parts in the variousviews.

Figure 1 is a transverse section through a rotary impact pulverizer.Fig. 2 is an enlarged elevation of one of .the bails disclosed. in Fig.1, showing fragments of the bailsuspension means. end-view of one of thebails of the pulverizer as-disclosed in 1. Fig.4 is an ens liners 'Fig.3 is anenlarged larged elevation of another form of bail,

showing fragments of means.

the bail suspension Fig. 5 is an enlarged end new of the form of baildisclosed in Fig. 4.

The rotary impact pulverizer, see Fig. 1, consists essentially of aseries of rapidly rotatable elements which are located within thehousing or inclosing casing 1. The casing '1 is provided with suitablefeed inlet and discharge openings 2, 3, and is mounted upon the casingbase 4. The upper casing surfaces and are secured within'the casing 1adjacent the upper portion of the circular path of movement of the bailends. The spaced bars 5 have involute impact surfaces thereon and arelocated adjacent the lower portion of the circular path of movement ofthe bail ends. The bars 5 are secured to the casing 1 and are spaced soas to permit discharge of pulverized material between them.

The main shaft 7 is rotatably mounted in suitable bearings formed in orsupported by the side walls of the casing 1 in the usual manner, and hasthe spaced suspension members or disks 8' fixed thereto. The suspensiondisks 8 are provided with equally spaced openings in which the bailsuspension pins 12 are mounted and reversibly secured by means of cotterpins. The pins 12 are arranged parallel to each other and have outwardlyprojecting ends which serve as pivots for the inner ends of the bailarms 9. Retaining collars 16 are secured to the ends of the suspensionpins 12 by means of cotter pins 17 and serve to retain the bail arms 9intheir proper positions upon the pins 12.

In the form of bail disclosed in Figs. 1, 2 and 3, the outer ends of theparallel and normally with holes through which the bail cross-barsuspension bolt 13 passes. The bail crossbar 10 ispro-vided withlongitudinal flanges 11 on the side thereof facing the shaft 7 and has apair of transverse projections 18 which ings therethrough which registerwith the openings in the outer ends of the bail arms 9. The bolt 13passes through the openings secured in place in the projections 18 andis by fineans of a lock nut 14 which is fixed to 6 are formed withinvolute impact radial bail arms9 are provided 9 through.

In the form of bail disclosed in Figs. 1 and 5, the parallel radial bailarms 19 are the bolt 13 by means of a cotter pin 15. The bail cross-bar10 is readily removable from the ends of the arms 9 by removal of thebolt 13 and may be secured to the arms 9 in reverse position since theconstruction of the cross-bar 10 is such that it is symmetrical about aradial plane passing centrally thereformed with hooked ends 23 whichextend in directions substantially at right angles to .the planes of thebail arms 19. The bail cross-bar 20 is provided with a pair oflongitudinally extending flanges 21 having a recess formed between them.A pair of spaced transverse projections 24 span the recess between theflanges 21 and have transverse openings corresponding in shape to theshape of the hooked bail arm ends 23, therein. lVith the bail assembled,the hooked ends 23 of the arms 19 extend through the correspondingopenings in the projections 241 and are prevented from leaving theseopenings by clips 22 which fit into parallel recesses formed in oppositesides of the hooked ends 23. The bail cross-bar 20 is readily removablefrom the bail by removing the cotter pins 17 and the clips 22 andsliding the bail arms 19 along the pin 12. The bail crossbar is alsoreversible relative to the arms 19, since it is formed symmetrical abouta radial plane passing centrally therethrough.

During the normal operation of the'device the material to be pulverizedis fed into the inclosing casing 1 through the feed inlet opening 2. Theshaft 7 and elements carried thereby are rotated at a high rate of speedin a clockwise-direction. The rapid rotation of the shaft 7 causes thebails to assume a radial position as shown in Fig. 1. The materialentering through the feed inlet opening 2 is fed into the path of therapidly revolving bail cross-bars 10 and is thrown by the impact againstthe involute surfaces of the liners 6 and bars 5. Due to the involuteformation of these surfaces the material is redirected toward therapidly advancing cross-bars 10 and the particles are thus pulverized byimpactupon themselves and upon the cross-bars 10, liners 6, and bars 5.Upon being pulverized to a proper degree of fineness, the material iswithdrawn from the casing 1 through the spaces between the bars 5 andthe discharge open in 3.

Thu: to the successive impingements of the material particles againstthe advancing sides of the bail cross-bars 10, it becomes necessaryafter a time to reverse these bars so that the trailing sides may belikewise utilized until worn. This reversal of the bars is accomplishedwith the form of bail disclosed in Figs. 1, 2 and 3, by removal of meansof U-shaped retaining the lock nuts 14 and the bolts 18. Reversal of thebail cross-bars 20 disclosed in Figs. 4 and 5 is accomplished by removalof the collars 16 and theretaining clips 22. After the bail cross-bars10, 20, have become worn to a degree making them unfit for furtherservice, they may be readily replaced by new bars 10, 20.

It should be noted that by bail crossbar 10, 20, with the transverseribs or flanges 11, 21, thereon, a cross-bar of great strength isproduced while at the same time an effective shield for the connectionsbetween the arms 9, "19, and the crossbarlO, intended to limit thepresent invention to a crossbar 10, 20, having a plurality of flangesthereon, since the necessary strength might be secured by providing onlya single flange 11,21, of suitable thickness. The protection of theconnection between the bail arms 9, 19, and the bail cross-bar 10, 20,might also be held by use of a single flange 11, 21, but suchconstruction would only afford protection to this connection forrevolution of the bail in one direction.

The formation of the bail crossbars 10, 20, with a longitudinal recesstherein, mits formation of a bar of the requisite forming the bars havebecome worn soas to make them unfit for further service. The fact thatonly the cross-bar 10,20, is newable and that this cross-bar is madereversible after excessive wear has occurred on one side thereof,furthermore reduces the percentage of'wasted metal. The bail arms 9, 19,and cross-bars 10 20 rough castings and need ing prior to assembling.

The means for securing the pins 12 to the suspension disks 8, readilypermits rotation of these-pins through arcs of degrees after their bailfaces have become excessively worn through constant oscillation of thebails on the pin ends. .Use of the collars 16 and cotter'pins 17 alsopermits ready removal of the bail arms 9, 19, from the ends of the pins12 and forms an efficient-means for preventing displacement of the arms9, 19, during normal operation of the machine.

It should be understood that it is not desired to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In a pulverizer, a casing, a rotatable shaft Within said casing,radial arms spaced longitudinally of said shaft, means for suspendingsaid arms from said shaft. :1 long? tudiually recessed cross-bar, andmeans 20, 18 provided. lit is however, not I and also greatly reducesthe per- I centage of waste material when the crossarm suspending sur- 1located entirely Within the recess of said cross-bar for detachablysecuring said bar to said arms.

2. In a pulverizer, a casing, a rotatable shaft within said casing, anda. bail suspended from said shaft, said bail comprising a plurality ofspaced radial arms and a longitudinally flanged cross-bar detachablysecured to the ends of said arms.

3. In a pulverizer, a casing,-a rotatable shaft within said casing, anda bail suspended from said shaft, said bail comprising a plurality ofspaced. radial arms and a cross-bar longitudinally flanged to form anintermediate recess, detachably secured "to said arms.

4. In a pulverizer, a casing, a rotatable shaft Within said casing,radial arms spaced longitudinally of said shaft, a recessed cross-bar,means for detachably securing said arms to said cross-bar within said recess, and means for suspending said arms from said shaft and for lockingsaid securing means.

. 5. In a pulverizer, a casing, a rotatable shaft Within said casing,and a bail suspended from said shaft, said bail comprising a pluralityof spaced arms, a cross-bar longitudinally flanged to form anintermediate recess, transverse projections spanning said recess, andmeans for securing said arms to said projections.

6. In a pulverizer, a casing, a rotatable shaft within said casing,radial arms suspended from said shaft, each of said arms having aprojection extending longitudicess, and means 4 nally of nally of saidshaft, and a cross-barsecured having, a projection extendinglongitudisaid arms nally of said shaft, a cross-bar longitudiform anintermediate refor securing said cross-bar to said projections Withinsaid recess.

8. In a pulverizer, a casing, shaft within said casing, radial armsspaced longitudinally of said shaft, each of said arms having-aprojection extending longi tudinally of said shaft, means forsuspendingsaid arms from said shaft, a cross-bar longitudinally flanged to form aninter mediate recess, and means for suspending said cross-bar from saidprojections Within nally flanged to said recess, said suspension meansserving to lock said. securing means;

9. In a pulverizer, a casing, a rotatable shaft within said casing, anarm having an integral projection extending longitudisaid shaft, meansfor suspending said arm from said shaft, and a heater portion having aportion engaging said projection.

In testimony whereof the signature of the inventor is aflixed hereto inthe presence of two Witnesses.

CHAS. S. LINCOLN. Witnesses: I

W. H. LIEBER,

Ron. E. S'roLL.

a rotatable

